diff --git a/farms/spawner.lua b/farms/spawner.lua
new file mode 100644
index 0000000..82a3306
--- /dev/null
+++ b/farms/spawner.lua
@@ -0,0 +1,155 @@
+local Peripheral = require('peripheral')
+local Point      = require('point')
+local Util       = require('util')
+
+local device     = _G.device
+local os         = _G.os
+local turtle     = _G.turtle
+
+local mobTypes = Util.transpose({ ... })
+
+local function equip(side, item, rawName)
+	local equipped = Peripheral.lookup('side/' .. side)
+
+	if equipped and equipped.type == item then
+		return true
+	end
+
+	if not turtle.equip(side, rawName or item) then
+		if not turtle.selectSlotWithQuantity(0) then
+			error('No slots available')
+		end
+		turtle.equip(side)
+		if not turtle.equip(side, item) then
+			error('Unable to equip ' .. item)
+		end
+	end
+
+	turtle.select(1)
+end
+
+equip('left', 'minecraft:diamond_sword')
+
+equip('right', 'plethora:scanner', 'plethora:module:2')
+local scanner = device['plethora:scanner']
+
+turtle.reset()
+local facing = scanner.getBlockMeta(0, 0, 0).state.facing
+turtle.point.heading = Point.facings[facing].heading
+
+local data = scanner.scan()
+local spawners = Util.findAll(data, 'name', 'minecraft:mob_spawner')
+local spawner = Point.closest(turtle.point, spawners) or error('spawner not in range')
+
+turtle._goto(Point.below(spawner))
+
+Util.filterInplace(data, function(b)
+	return b.name == 'minecraft:chest' or
+		 b.name == 'minecraft:dispenser' or
+		 b.name == 'minecraft:hopper'
+end)
+local chest = Point.closest(spawner, data) or error('missing drop off chest')
+turtle._goto(Point.above(chest))
+
+equip('right', 'plethora:sensor', 'plethora:module:3')
+local sensor = device['plethora:sensor']
+
+turtle.setMovementStrategy('goto')
+turtle.setPolicy(turtle.policies.attack)
+
+local function dropOff()
+	local inv = turtle.getSummedInventory()
+	for _, slot in pairs(inv) do
+		if slot.count >= 16 then
+			if turtle.getFuelLevel() < 5000 then
+				turtle.refuel(slot.name, 16)
+			end
+		end
+	end
+
+	inv = turtle.getSummedInventory()
+	for _, slot in pairs(inv) do
+		if slot.count >= 16 or turtle.getSlot(8).count > 0 then
+			turtle.eachFilledSlot(function(s)
+				if s.name ~= 'plethora:module' then
+					turtle.dropDownAt(chest, s.name, s.count)
+				end
+			end)
+			break
+		end
+	end
+	turtle.select(1)
+end
+
+local function normalize(b)
+	b.x = Util.round(b.x) + turtle.point.x
+	b.y = Util.round(b.y) + turtle.point.y
+	b.z = Util.round(b.z) + turtle.point.z
+
+	return b.x >= spawner.x - 4 and b.x <= spawner.x + 4 and
+			   b.y >= spawner.y - 4 and b.y <= spawner.y + 4 and
+	       b.z >= spawner.z - 4 and b.z <= spawner.z + 4
+end
+
+local function aboveAttack(b)
+	if turtle.attackDownAt(b) then
+		repeat until not turtle.attackDown()
+	end
+end
+
+local function moveAgainst(b)
+	if turtle.faceAgainst(b) then
+		return turtle.attack()
+	end
+end
+
+local function getAttackStrategy(name)
+	local Strategies = {
+		Pig = {
+			attack = aboveAttack,
+		},
+		Default = {
+			attack = moveAgainst,
+		}
+	}
+
+	return Strategies[name] or Strategies.Default
+end
+
+while true do
+	local blocks = sensor.sense()
+	local mobs = Util.filterInplace(blocks, function(b)
+		if mobTypes[b.name] then
+			return normalize(b)
+		end
+	end)
+
+	if turtle.getFuelLevel() == 0 then
+		error('Out of fuel')
+	end
+
+print(#mobs)
+	if #mobs == 0 then
+print('sleeping')
+		os.sleep(3)
+	else
+		Point.eachClosest(turtle.point, mobs, function(b)
+print('attack: ' .. b.id)
+			local strategy = getAttackStrategy(b.name)
+			if strategy.attack(b) then
+				while true do
+					local mob = sensor.getMetaByID(b.id)
+					if not mob or Util.empty(mob) then
+						break
+					end
+					normalize(mob)
+					if not strategy.attack(mob) then
+						break
+					end
+				end
+			end
+		end)
+	end
+
+	dropOff()
+end